<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <el-form
          class="login-form"
          :model="loginForm"
          :rules="rules"
          ref="loginForms"
        >
          <h1>Hello</h1>
          <h2>欢迎来的硅谷甄选</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              v-model="loginForm.username"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              :prefix-icon="Lock"
              type="password"
              v-model="loginForm.password"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              :loading="loading"
              class="login-btn"
              type="primary"
              size="default"
              @click="login"
            >
              登录
            </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue'
import { useRouter,useRoute } from 'vue-router'
import { ElNotification } from 'element-plus'
import { getTime } from '@/utils/time'
//引入用户相关的小仓库
import useUserStore from '@/store/modules/user'
let useStore = useUserStore()
//获取el-form组件
let loginForms = ref()
//获取路由器
let $router = useRouter()
//获取路由对象
let $route =useRoute();
//定义变量控制按钮加载效果
let loading = ref(false)
//收集账号和密码的信息
let loginForm = reactive({
  username: 'admin',
  password: '111111',
})
//登录按钮的回调
const login = async () => {
  //要保证所有的表单项，校验通过，才能提交
  await loginForms.value.validate()
  //加载效果:开始加载
  loading.value = true
  //点击登录按钮以后干什么?
  //通知仓库发登录请求
  //请求成功->首页展示数据的地方
  //请求失败->弹出登录失败信息
  try {
    //保证登录成功
    await useStore.userLogin(loginForm)
    //编程式导航跳转到展示数据首页
    //判断登录的时候路由路径中是否有query参数，如果有跳转到query路径，没有跳转到 /
    let redirect:any = $route.query.redirect;
    $router.push({path:redirect || '/'});
    //登录成功提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `HI,${getTime()}好！`,
    })
    //登录成功加载效果也消失
    loading.value = false
  } catch (error) {
    //登录失败加载效果消息
    loading.value = false
    //登录失败的提示信息
    ElNotification({
      type: 'error',
      message: (error as Error).message,
    })
  }
}
//自定义校验规则函数
const validateUserName = (rule: any, value: any, callback: any) => {
  ///^\d{6,12}$/.test(value)  长度为6-12的是数字
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度至少5位！！！'))
  }
}
const validatePassword = (rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('密码长度至少6位！！！'))
  }
}
//定义表单校验需要配置对象
const rules = {
  username: [
    //{ required: true, min: 6, max: 18, message: '用户长度为 6 到 18', trigger: 'change' },
    { trigger: 'change', validator: validateUserName },
  ],
  password: [
    //{ required: true, min: 6, max: 18, message: '密码长度为 6 到 18', trigger: 'change' },
    { trigger: 'change', validator: validatePassword },
  ],
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh; //表示元素的高度将占据整个视口（即浏览器窗口
  background: url(@/assets/images/background.jpg) no-repeat;
  background-size: cover;
}

.login-form {
  position: relative;
  width: 80%;
  top: 30vh;
  background: url(@/assets/images/login_form.png);
  background-size: cover;
  padding: 40px;

  h1 {
    color: white;
    font-size: 40px;
  }

  h2 {
    color: white;
    font-size: 40px;
    margin: 20px 0px;
  }

  .login-btn {
    width: 100%;
  }
}
</style>
